File:QuadraDisk.jpg
From Infogalactic: the planetary knowledge core
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Original file (1,321 × 1,269 pixels, file size: 1.15 MB, MIME type: image/jpeg)
Summary
An RCA QuadraDisc recording. The color fringes around the reflections are caused by the ultrasonic signal that carries the difference information used to separate the four channels.
Licensing
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| Date/Time | Thumbnail | Dimensions | User | Comment | |
|---|---|---|---|---|---|
| current | 21:42, 7 January 2017 | | 1,321 × 1,269 (1.15 MB) | 127.0.0.1 (talk) | <p>An RCA QuadraDisc recording. The color fringes around the reflections are caused by the ultrasonic signal that carries the difference information used to separate the four channels. </p> |
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